# Z16 Chevy Chevelle – Rare GM Letters On The Z-16’s Creation Doug Marion Dec 1, 2010 0 Comment(s) This story is factory official Chevelle history at its best. It begins in mid-1964, when Chevrolet was planning the introduction of its brand-new Mark IV 396 engine, initially slated for Chevy’s full-size cars and the Corvette. […]